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Dictionary of Engineering

13.0 temperature
thermodynamics
See annealing point
a
electricity
See ampere
a axis
mechanical engineering
The angle that specifies the rotation of a machine tool about the x axis.
A block
civil engineering
A hollow concrete masonry block with one end closed and the other open and with a web between, so that when the block is laid in a wall two cells are produced.
A frame
building construction engineering
A dwelling whose main frames are in the shape of the letter A.Two poles supported in an upright position by braces or guys and used for lifting equipment. Also known as double mast.
A size
engineering
One of a series of sizes to which trimmed paper and board are manufactured, for size AOf a sheet of paper, the dimensions 8.5 inches by 11 inches (216 millimeters by 279 millimeters).
A-mast
engineering
An A-shaped arrangement of upright poles for supporting a mechanism designed to lift heavy loads.
abandon
engineering
To stop drilling and remove the drill rig from the site of a borehole before the intended depth or target is reached.
abat-jour
building construction
A device that is used to deflect daylight downward as it streams through a window.
abat-vent
building construction
A series of sloping boards or metal strips, or some similar contrivance, to break the force of wind without being an obstruction to the passage of air or sound, as in a louver or chimney cowl.
abattoir
industrial engineering
A building in which cattle or other animals are slaughtered.
ablatograph
engineering
An instrument that records ablation by measuring the distance a snow or ice surface falls during the observation period.
abnormal reading
industrial engineering
See abnormal time
abnormal time
industrial engineering
During a time study, an elapsed time for any element which is excessively longer or shorter than the median of the elapsed times. Also known as abnormal reading.
abort branch
control systems
A branching instruction in the program controlling a robot that causes a test to be performed on whether the tool-center point is properly positioned, and to reposition it if it drifts out of the acceptable range.
Abrams' law
civil engineering
In concrete materials, for a mixture of workable consistency the strength of concrete is determined by the ratio of water to cement.
abrasion test
mechanical engineering
The measurement of abrasion resistance, usually by the weighing of a material sample before and after subjecting it to a known abrasive stress throughout a known time period, or by reflectance or surface finish comparisons, or by dimensional comparisons.
abrasive belt
mechanical engineering
A cloth, leather, or paper band impregnated with grit and rotated as an endless loop to abrade materials through continuous friction.
abrasive blasting
mechanical engineering
The cleaning or finishing of surfaces by the use of an abrasive entrained in a blast of air.
abrasive cloth
mechanical engineering
Tough cloth to whose surface an abrasive such as sand or emery has been bonded for use in grinding or polishing.
abrasive cone
mechanical engineering
An abrasive sintered or shaped into a solid cone to be rotated by an arbor for abrasive machining.
abrasive disk
mechanical engineering
An abrasive sintered or shaped into a disk to be rotated by an arbor for abrasive machining.
abrasive jet cleaning
engineering
The removal of dirt from a solid by a gas or liquid jet carrying abrasives to ablate the surface.
abrasive machining
mechanical engineering
Grinding, drilling, shaping, or polishing by abrasion.
abreast milling
mechanical engineering
A milling method in which parts are placed in a row parallel to the axis of the cutting tool and are milled simultaneously.
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